Drafting and engraving machine.



H. S. NUNAMAKER. DRAFTING-AND ENGRAVING MACHINE.

APPLICATION FILED APR.14, 1910.

972,569. Patented oet. 11. 1910.

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HENRY S. NUNAMAKER, OF CLEVELAND, OHIO.

DRAFTING AND ENGRAVING MACHINE.

Specicaton of Letters Patent.

Patented Oct. 11, 1910.

Application filed April 14, 1910. Serial No. 555,439.

To all whom 'it may concern:

Be it known that I, HENRY S. NUNA- MAKER, la citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a new and useful Drafting and Engraving Machine, of which the following is a speci fication.

My invention relates to improvements in devices for producing accurate work in drafting and engraving and more particularly to improvements in that class of parallel rulers known as section liners.

My invention has special reference to a simplified form of device wherein an adjustable ruler is used in connection with certain guides, supports and actuating mechanism as will hereinafter more fully appear.

The objects of my improvement are to provide a device of the character mentioned, simple in construction and cheaply made while at the same time capable of producingd accurate work and conveniently operate Another object of my invention is to provide means for holding the ruling pen or other instrument at a predetermined angle while in use.

Still another object is to provide means whereby an ordinary quill pen may be used in connection with the device and whereby certain results may be obtained which it would be difficult if not impossible to obtain otherwise.

I attain these objects, together with other objects readily apparent to those skilled in the art, by the construction illustrated in the accompanying drawing, in which- Figure 1 shows a perspective view of my device with a ruling pen in use therewith. Fig. 2 is a perspective view of my improved instrument guide showing an ordinary quill pen connected thereto. Fig. 3 is a section on line 3-3, of Fig. 1. Fig. 4. is an enlarged fragmentary view similar to Fig. 3 showing the operating lever in raised position. Fig. 5 is a section on line 5 5, Fig. l.

Similar numerals of reference indicate corresponding parts in all the figures of the drawing.

Referring now to the drawing, 1 repre sents a head, similar to those employed upon -squares, to the upper face of which is secured a guide plate 2, which is preferably constructed of metal and has an integral guide flange 3 upon its rear edge. The ends of the head 1 preferably plate 2, as at 4:, and are provided with apertures 5, through which any suitable fastening means may be inserted for securing the head to a drafting board or table. The inner edge of the head 1 is preferably provided at the upper face with the longitudinal groove 6. Mounted upon the guide plate 2 is the sliding head 7 which consists of the sliding plate 8 and the ruler support 9. The sliding plate 8 is provided with the curved-under fiange 8a engaging the unfianged edge of the plate 2 and with a pair of threaded lugs 10, which pass through slots 11 in the ruler support 9 and are provided with thumb nuts 12. The ruler support 9 is provided upon its outer or rear side with the offset portion 13, which slides upon the upper face of the guide flange 3, and is provided with the two curved flanges 14k adapted to engage the outside or rear edge of the guide flange 3. It will be understood that the slots 11 will permit relative adjustment of the plate 8 and support 9 and when such adjustment has been made to produce the proper close contact as between the flanges 8EL and 14 and the guide plate 2 the nuts 12 may be turned to hold said plate and support in fixed adjustment. The frictional contact as between the sliding head and guide plate may thus be readily increased or diminished.

The spacing gage 15 is adjustably secured to the off-set portion 13 by means of the threaded lug 16, which is secured to said off-set portion and projects through the slot 17 in the spacing gage and is provided with the thumb nut 18. The spacing block 19 slides upon the guide flange 3, adjacent the ruler support 9 and is provided with the pin 20, which engages the projection 21 upon the spacing gage. The block 19 is provided upon its inner end with a downwardly curved flange 22, which engages the underside of the flange 3, and with the lugs 23,

which engage the outer edge of the flange 3.

Upon the upper face of the block 19 is pivoted the spacing lever 24C. The sliding plate 8 is provided with the slotted lug 25, through the slot 26 in which extends the inner end 27 of the spacing lever 24;.

The ruler 28 is pivoted to the forward end of the ruler support by means of the screw 29, which screw is provided with the wing nut 30 adapted to clamp the ruler 28 at any desired angle. The pointer 31 is proeXtend beyond the vided upon the end of the ruler 28 and registers with the protractor 32 upon the ruler support 9. The 4ruler 28 is preferably made of wood and provided with the longitudinal groove 33 in which is embedded the U- shaped metal strip 34. The bottom wall of the groove 33 is semi-circular in cross-section and the side walls are straight and parallel, the depth of the groove being greater than its width. The instrument guide 35 is provided with the reduced portion 36 adapted to slide within the longitudinal groove 33. rIhe instrument guide is preferably made of hard wood and is provided with the metallic pen yoke 38 having the rounded shank 39 extending at right angles to the reduced portion 36 and which fits snugly within the aperture 40 in the instrument guide 35, and is adapted to be rotated within said aperture but normally frictionally held against rotation. The yoke 38 is provided upon its forward end with the bifurcated portion 41, which is provided with the screw 42 and thumb nut 43 adapted to clamp a ruling pen 44 or other instrument between the arms of the bifurcated portion 41.

In Fig. 2 I have shown an ordinary quill pen 45 clamped between the arms of the said bifurcated portion. For this purpose I use a wooden holding-pin 46, preferably oval in cross-section, which is adapted to t within the concave side of the shank of the pen 45, and is clamped, together with the pen, between the arms of the bifurcated portion 41 of the pen yoke. The shank 39 of the pen yoke is adapted to be slightly rotated within the aperture 40 of the instrument guide, so as to allow the pen to be arranged at dierent angles to the paper, in order to produce various effects which may be desired. The instrument guide 35 is pro-yY vided with the portion 47 at its lower end which portion is cylindrical in shape and of a diameter adapted to closely but slidably engage the semi-circular bottom wall of the groove 33. The portion 47 is attached to the body of the guide 35 by a narrowed portion 472L of less cross measurement than the diameter of the portion 47. By this construction when an ordinary pen is being used in the device as shown in Fig. 2, a slight pressure upon the outer end of the pen yoke will slightly tilt the instrument guide and vary the thickness of the lines by spreading the points of the pen as desired. However, when a ruling pen is being used with the device, there will be no tilting of the instrument guide as the ruling pen is rigid and will not be affected by any pressure upon the pen yoke.

It is to be understood that the device may be used without the instrument guide or pen yoke shown in Fig. 1 as an ordinary ruling pen or other suitable instrument may be used along the edge of the ruler 28, the same as with the ordinary T-square or angle. In fine shading upon drawings and in engraving work, however, it is necessary that the pen or other instrument be always held at exactly the same angle with reference to the paper so as to produce lines of uniform thickness and distance from each other. l/Jith the instrument guide and pen yoke described it is possible to produce work of greater accuracy than is possible without the use of this device, such work being produced rapidly and with the exercise of very little skill on the part of the operator.

The operation of the device is as follows: The spacing block 19 is brought into contact with the ruler support 9 and the spacing gage 15 is set for the desired spacing, the distance between the inner edge of the projection 21 and the pin 20 being the distance which the sliding head will be permitted to move when actuated by the lever 24. The device as shown in Fig. 1 is ready for operation, the lever being shown at the limit of its backward thrust. To move the sliding head to the right from the position shown in Fig. 1, the lever 24 is slightly raised bringing the lugs 23 out of contact with the guide flange 3, as shown in Fig. 4, and then moved to the right, bringing the pin 20 out of contact with the projection 21 of the spacing gage. The end of the lever is then depressed, bringing the lugs 23 into frictional contact with the guide flange 3 as shown in Fig. 3, and moved to the left. During this operation the spacing block 19 is held stationary upon the guide ange 3, and t-he sliding head 7 is moved one space to the right, the projection 21 of the spacing gage coming into contact with the pin 20 upon the spacing block and limiting the movement of the head, thereby. The parts are then again in the relation to each other@ shown in Fig. 1. It is evident that by a reversal of direction of movement of the lever 24 the sliding head may be moved in the opposite direction. -It should be also noted that the device may be used as a T-square, if desired, the ruler 28 being set at 9()o or any desired angle to the head 1, and the device used in the Samemanner as the ordinary T-square.

I claim:

1. In a drafting and engraving machine, a ruler provided with a longitudinal U- shaped groove in its upper face, an instrument guide provided with a reduced portion adapted to slide within said groove, and a pen yoke adjustably secured to said instrument guide, said pen yoke being provided with a bifurcated portion adapted to receive a pen or other instrument.

2. In a drafting and engraving machine a guide plate provided with a guide flange, a sliding plate mounted upon said guide plate and having a flange projecting beneath said adapted to `by said spacing' bleek, a spacing guide plate, a ruler support adjustably secured to said sliding plate and having curved flanges adapted to engage the rear side of the guide lange upon said guide plate, a spacing block mounted upon said guide plate and provided with lugs, a spacing lever carried by said spacing block and bring said lugs into frietional Contact with said guide flange, a slotted lug upon said sliding' plate adapted 'to be engaged by said spacing lever, a pin Carried gage adapted to Contact with said pin and limit the movement of said sliding plate and a ruler carried by said ruler support.

3. In a drafting and engraving machine, a ruler provided with a longitudinal U- shaped groove in its upper face, an instrument guide provided With a reduced portion adapted to slide Within said groove and a pen yole secured to said instrument guide at right angles to said reduced portion, said pen yoke adapted to be rotated With reference to said instrument guide but normally frietionally held `against rotation, said pen yoke provided With' a peirattaeliing portion.

ll. In a drafting and engraving machine, a guide plate provided with a guide flange along one of its longitudinal edges, a sliding plate arranged upon said guide plate and having a curved-under flange engaging the unianged edge of the said guide plate, a ruler support provided With a Curved iiange adapted to engage the outside edge of the guide flange of said guide plate, said sliding plate and said ruler support being adapted for relative adjustment, means for holding said sliding plate and said support in fixed adjustment and a ruler Connected tosaid ruler support.

In testimony that I claim the above, I have hereunto subscribed my name in the presence of tWo Witnesses. 1

HENRY s. NUNAMAKER. Y

Witnesses:

E. JAY RICE, B. I-I. MARTIN. 

